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參數(shù)資料
| 型號： | 73K321L |
| 廠商： | TDK Corporation |
| 英文描述： | Miniature Switch, High Precision |
| 中文描述： | 國際電話電報諮詢委員會.23，.21單芯片調(diào)制解調(diào)器 |
| 文件頁數(shù)： | 19/24頁 |
| 文件大?。?/td> | 140K |
| 代理商： | 73K321L |
73K321L
CCITT V.23, V.21
Single-Chip Modem
19
APPLICATIONS INFORMATION
GENERAL CONSIDERATIONS
Figures 1 and 2 show basic circuit diagrams for
K-Series
modem
integrated
products are designed to be used in conjunction with
a control processor, a UART or RS-232 serial data
interface, and a DAA phone line interface to function
as a typical intelligent modem. The K-Series ICs
interface directly with Intel 8048 and 80C51
microprocessors for control and status monitoring
purposes.Two typical DAA arrangements are shown:
one for a split ±5 or ±12 volt design and one for a
single 5 volt design. These diagrams are for
reference only and do not represent production-
ready modem designs.
circuits.
K-Series
K-Series devices are available with two control
interface versions: one for a parallel multiplexed
address/data interface, and one for a serial
interface. The parallel version is intended for use
with 8039/48 or 8031/51 microcontrollers from Intel
or many other manufacturers. The serial can be
used with other microcontrollers or in applications
where only a limited number of port lines are
available or the application does not lend itself to a
multiplexed address/data interface. The parallel
versions may also be used in the Serial mode, as
explained in the data sheet pin description.
In most applications the controller will monitor the
serial data for commands from the DTE and the
received data for break signals from the far end
modem. In this way, commands to the modem are
sent over the same line as the transmitted data. In
other applications the RS-232 interface handshake
lines are used for modem control.
FIGURE 1: Basic Box Modem with Dual-Supply Hybrid
RS232
LEVEL
CONVERTERS
CA
CB
CC
CD
CF
RTS
CTS
DSR
DTR
DCD
P1.0
P1.1
P1.2
P1.3
P1.5
P1.6
P1.7
P3.0
RESET
TXD
RXD
EXCLK
RXCLK
TXCLK
BA
BB
DA
DD
DB
U5, U6
MC145406
RD
WR
ALE
P3.1
P3.2
P0.0-7
INT
XTL2
XTL1
N/C
80C51
XTL1
INT
XTL2
ISET
GND
RD
WR
ALE
CS
VREF
RXA
CLK
VDD
11Y1
MHZ
C14
39 pF
C13
18 pF
R10
2.2M
+5V
0C10
C11
0.1 μF
0.C9
22C8
+
RESET
C12
+5V
TXA
0.C6
RXA
LM 1458
-
+
R5
37.4K
39C1
R4
5.1K
R4
20K
C7
0.1 μF
TXA
R6
20K
475 1%
0.4C5
250V
D1
IN4004
R8
22K
T1
MIDCOM
VR1
MOV
V250L20
T
R
U2
4N35
+5V
K1
D2
IN914
2N2222A
Q1
R9
10K
U1A
R3
3.6K
10C3
V+
4R7
C2
300 pF
LM 1458
+
U1B
V–
0.0C4
R1
D3, D4
Z4.7V
K-LOW
FAMILY
22K
+5
AD7:0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 73K322L-IH | CCITT V.23, V.22, V.21 Single-Chip Modem |
| 73K322L-IP | CCITT V.23, V.22, V.21 Single-Chip Modem |
| 73K322L | CCITT V.23, V.22, V.21 Single-Chip Modem(CCITT V.23, V.22, V.21單片Modem) |
| 73M223 | 1200 Baud FSK Modem |
| 73M223-CL | 1200 Baud FSK Modem |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 73K321L-IH | 制造商:TDK 制造商全稱:TDK Electronics 功能描述:CCITT V.23, V.21 Single-Chip Modem |
| 73K321L-IP | 制造商:TDK 制造商全稱:TDK Electronics 功能描述:CCITT V.23, V.21 Single-Chip Modem |
| 73K322L | 制造商:TDK 制造商全稱:TDK Electronics 功能描述:CCITT V.23, V.22, V.21 Single-Chip Modem |
| 73K322L-IH | 制造商:TDK 制造商全稱:TDK Electronics 功能描述:CCITT V.23, V.22, V.21 Single-Chip Modem |
| 73K322L-IP | 制造商:TDK 制造商全稱:TDK Electronics 功能描述:CCITT V.23, V.22, V.21 Single-Chip Modem |
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